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block: move cgroup time handling code into blk.h

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In preparation for moving time keeping into blk.h, move the cgroup
related code for timestamps in here too. This will help avoid a circular
dependency, and also moves it into a more appropriate header as this one
is private to the block layer code.

Leave struct bio_issue in blk_types.h as it's a proper time definition.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2024-01-16 14:14:59 -07:00
parent 72e84e909e
commit c4e47bbb00
3 changed files with 43 additions and 42 deletions
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42
block/blk.h
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@@ -516,4 +516,46 @@ static inline int req_ref_read(struct request *req)
return atomic_read(&req->ref);
}
/*
* From most significant bit:
* 1 bit: reserved for other usage, see below
* 12 bits: original size of bio
* 51 bits: issue time of bio
*/
#define BIO_ISSUE_RES_BITS 1
#define BIO_ISSUE_SIZE_BITS 12
#define BIO_ISSUE_RES_SHIFT (64 - BIO_ISSUE_RES_BITS)
#define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS)
#define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1)
#define BIO_ISSUE_SIZE_MASK \
(((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT)
#define BIO_ISSUE_RES_MASK (~((1ULL << BIO_ISSUE_RES_SHIFT) - 1))
/* Reserved bit for blk-throtl */
#define BIO_ISSUE_THROTL_SKIP_LATENCY (1ULL << 63)
static inline u64 __bio_issue_time(u64 time)
{
return time & BIO_ISSUE_TIME_MASK;
}
static inline u64 bio_issue_time(struct bio_issue *issue)
{
return __bio_issue_time(issue->value);
}
static inline sector_t bio_issue_size(struct bio_issue *issue)
{
return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT);
}
static inline void bio_issue_init(struct bio_issue *issue,
sector_t size)
{
size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1;
issue->value = ((issue->value & BIO_ISSUE_RES_MASK) |
(ktime_get_ns() & BIO_ISSUE_TIME_MASK) |
((u64)size << BIO_ISSUE_SIZE_SHIFT));
}
#endif /* BLK_INTERNAL_H */